been loading for 40 years and have never seen this, my OAL on my 6.5x284 will not go below 3.215, heres how I set it up, new Lapua brass, I put a piece of brass in the shell holder and raise my RCBS ram to the top, then screw the seating die down until it touches the case mouth then back it off a half turn and lock down the lock ring. I seat a bullet with the seating stem screwed all the way down on a 140 Nosler accubond and the shortest I can get them is 3.215 which of course will not chamber. I am suspecting the dies but they are marked 6.5x284 win.